What the Blood Supply Shows About Covid-19's Spread
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In March, as the Covid-19 pandemic began to shut down major cities in the U.S., researchers were thinking about blood. In particular, they were worried about the U.S. blood supply — the millions of donations every year that help keep hospital patients alive when they need a transfusion.
The researchers were able to put to rest their initial concerns about the virus spreading via the blood supply. But they quickly realized that all those blood donations might offer a vital source of data on the pandemic...